Yes
July 24, 1971
The Yale Bowl, New Haven CT

Source:
SBD > master reel > cdr

That is all I know truthfully.  The fellow I received it from said he had borrowed the master reels from the owner, copied them, and returned them.
He seemed very sincere about it so I would tend to think the lineage accurate.
It sure sounds mighty clean.


1) Yours is No Disgrace

2) I've Seen All Good People 

3) Clap / Classical Gas

4) Perpetual Change (w/Bruford solo)